Intangible Assets - Components of Gross and Net Intangible Asset Balances (Details) - USD ($)	1 Months Ended	12 Months Ended
	Jul. 31, 2012	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net		$ 2,023,000
Licensed Intellectual Property [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount		4,750,000	$ 4,750,000
Accumulated amortization		2,727,000	2,126,000
Finite-Lived Intangible Assets, Net		2,023,000	$ 2,624,000
Advanced Liquid Logic, Inc. [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 250,000	$ 500,000
Indefinite-Lived License Agreements, Potential Cash Payment	$ 1,750,000